3121005012 has 12 divisors (see below), whose sum is σ = 7282345056. Its totient is φ = 1040335000.

The previous prime is 3121004983. The next prime is 3121005077. The reversal of 3121005012 is 2105001213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 3121004982 and 3121005000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130041864 + ... + 130041887.

It is an arithmetic number, because the mean of its divisors is an integer number (606862088).

Almost surely, 2^3121005012 is an apocalyptic number.

It is an amenable number.

3121005012 is an abundant number, since it is smaller than the sum of its proper divisors (4161340044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121005012 is a wasteful number, since it uses less digits than its factorization.

3121005012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260083758 (or 260083756 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 3121005012 is about 55865.9557512444. The cubic root of 3121005012 is about 1461.3855945923.

Adding to 3121005012 its reverse (2105001213), we get a palindrome (5226006225).

The spelling of 3121005012 in words is "three billion, one hundred twenty-one million, five thousand, twelve".